People have chimed in and talked about the Foursquare outage. The nice part about these discussions is that they’re focusing on the technical problems with the current set up and Foursquare. They’re picking it apart and looking at what is right, what went wrong, and what needs to be done differently in MongoDB to prevent problems like this in the future.
Let’s play a “what if” game. What if Foursquare wasn’t using MongoDB? What if they were using something else?
Riak? Cassandra? HBase? MySQL?